The vgem driver is currently registered independent of any actual device. Some usage of the dmabuf APIs require an actual device structure to do anything. Register a dummy platform device for use with dmabuf.
Signed-off-by: Laura Abbott labbott@redhat.com --- I realize the original driver had a note about 'drop platform support'. I strongly dislike platform devices but they are the easiest way to get a device structure for use with APIs like dmabuf. --- drivers/gpu/drm/vgem/vgem_drv.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c index a1f42d1..b94feef 100644 --- a/drivers/gpu/drm/vgem/vgem_drv.c +++ b/drivers/gpu/drm/vgem/vgem_drv.c @@ -329,12 +329,19 @@ static struct drm_driver vgem_driver = { };
static struct drm_device *vgem_device; +static struct platform_device *vgem_pdev;
static int __init vgem_init(void) { int ret;
- vgem_device = drm_dev_alloc(&vgem_driver, NULL); + vgem_pdev = platform_device_register_simple("vgem", -1, NULL, 0); + if (IS_ERR(vgem_pdev)) + return PTR_ERR(vgem_pdev); + + dma_coerce_mask_and_coherent(&vgem_pdev->dev, DMA_BIT_MASK(64)); + + vgem_device = drm_dev_alloc(&vgem_driver, &vgem_pdev->dev); if (IS_ERR(vgem_device)) { ret = PTR_ERR(vgem_device); goto out; @@ -349,6 +356,8 @@ static int __init vgem_init(void) out_unref: drm_dev_unref(vgem_device); out: + platform_device_unregister(vgem_pdev); + return ret; }
@@ -356,6 +365,7 @@ static void __exit vgem_exit(void) { drm_dev_unregister(vgem_device); drm_dev_unref(vgem_device); + platform_device_unregister(vgem_pdev); }
module_init(vgem_init);